northern michigan, to giants stadium in new jersey, and to a farm outside detroit where in 2006 the fbi razed a 3,000-foot barn and dug under it. once the leader of the teamst s teamsters, the nation's largest union, hoffa's connection to organized crime kept him in hot water. >> i believe he was in a power struggle and was killed by an organized crime figure. >> reporter: that possibility could also explain the long silence. >> i mean, he's terrified right now. i can hear his voice trembling yesterday when i was talking to him. >> reporter: could this be where the 37-year search for hoffa finally ends? >> we have never advocate that had this is jimmy hoffa's resting place. we're strictly investigating this as a cold case homicide, and that has been our focus since the beginning. if it somehow happens to be mr. hoffa, well, great, it will end a major mystery. >> reporter: police say it will take about two hours to take a core soil sample that will be sent to a forensic anthropologist at michigan state university, and if they find signs of human remains, then they are going to dig this d